void TriangulateEstuary(HexCell cell, HexDirection direction)
{
var neighbor = cell.GetNeighbor(direction);
EdgeVertices closerWaterEdge = cell.WaterEdges[(int)direction];
EdgeVertices furtherWaterEdge = neighbor.WaterEdges[(int)direction.Opposite()];
EdgeVertices furtherEdge = neighbor.Edges[(int)direction.Opposite()];
furtherEdge.V1.y = HexMetrics.WaterSurfaceY;
furtherEdge.V2.y = HexMetrics.WaterSurfaceY;
furtherEdge.V3.y = HexMetrics.WaterSurfaceY;
furtherEdge.V4.y = HexMetrics.WaterSurfaceY;
furtherEdge.V5.y = HexMetrics.WaterSurfaceY;
WaterShore.AddTriangleUnperturbed(furtherEdge.V5, closerWaterEdge.V2, closerWaterEdge.V1);
WaterShore.AddTriangleUnperturbed(furtherEdge.V1, closerWaterEdge.V5, closerWaterEdge.V4);
WaterShore.AddTriangleUV(new Vector2(0f, 1f), new Vector2(0f, 0f), new Vector2(0f, 0f));
WaterShore.AddTriangleUV(new Vector2(0f, 1f), new Vector2(0f, 0f), new Vector2(0f, 0f));
// left quad
// quad is rotated 90 degrees to the right so the diagonal connection is shorter
// it is done to maintain the symetry with the other quad
Estuaries.AddQuadUnperturbed(furtherEdge.V5, closerWaterEdge.V2, furtherEdge.V4, closerWaterEdge.V3);
Estuaries.AddQuadUV(new Vector2(0f, 1f), new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(0f, 0f));
// big triangle in the middle
Estuaries.AddTriangleUnperturbed(closerWaterEdge.V3, furtherEdge.V4, furtherEdge.V2);
Estuaries.AddTriangleUV(new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(0f, 1f));
// right quad
Estuaries.AddQuadUnperturbed(closerWaterEdge.V3, closerWaterEdge.V4, furtherEdge.V2, furtherEdge.V1);
Estuaries.AddQuadUV(new Vector2(0f, 0f), new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(0f, 1f));
// is incoming river
if (cell.IncomingRiver == direction)
{
Estuaries.AddQuadUV2(
new Vector2(1.5f, 1f), new Vector2(0.7f, 1.15f),
new Vector2(1f, 0.8f), new Vector2(0.5f, 1.1f));
Estuaries.AddTriangleUV2(
new Vector2(0.5f, 1.1f), new Vector2(1f, 0.8f), new Vector2(0f, 0.8f));
Estuaries.AddQuadUV2(
new Vector2(0.5f, 1.1f), new Vector2(0.3f, 1.15f),
new Vector2(0f, 0.8f), new Vector2(-0.5f, 1f));
}
else
{
// the U coordinates have to be mirrored for outgoing rivers
// the V coordinates are a little bit less straightforward
Estuaries.AddQuadUV2(
new Vector2(-0.5f, -0.2f), new Vector2(0.3f, -0.35f),
new Vector2(0f, 0f), new Vector2(0.5f, -0.3f));
Estuaries.AddTriangleUV2(
new Vector2(0.5f, -0.3f), new Vector2(0f, 0f), new Vector2(1f, 0f));
Estuaries.AddQuadUV2(
new Vector2(0.5f, -0.3f), new Vector2(0.7f, -0.35f),
new Vector2(1f, 0f), new Vector2(1.5f, -0.2f));
}
}
